Ventilator for passenger vehicles



' Aug. 25, 1925.

7 1,551,528 E. L. FORD VENTILATOR FOR'PASSENGER VEHICLES -Original Filed p 11. 1922 Patented An, 25, 1925;

ERNEST LEONARD FOR-D, or DAR rNGTON, ENGLAND.

vnn rrnaron son PASSENGER VEHICLES.

Oris inal an lication filed To aZZ 'LU 7mm it may concern.

Be it known that I, ERNEST LEONARD Foam a S11l 16t of the King of Great Britain and Ireland, residin at Honeypot W' orks,

Honeypot Lane, Darlington,in the county of Durham, England, have invented certain new and useful Improvements in Ventilators for Passenger Vehicles, of which the following is a specification.

This invention relates,to ventil'ators for passenger vehicles of the closed or partially closed type and consists of a modification of the ventilator forming the subject matter of my application Serial No. 587,486, filed 11th September, 1922, the object being'too provide a ventilator the valve of which will open automatically when the vehicle moves forward by reason solely of the flow of air over it. The present application is a division the aforementioned application Serial lo.,58?,4c86, filed gepteinber ll, 1922.

I attain this endbythe device shown in the accompanying drawings, in which the figure is a view in cross section showing the basic form of this invention.

The device comprises a frame 7 adapted to be secured to the roof 2 of the body of the vehicle and having an aperture adapted to register with an aperture lin said roof a flap valve 4- pivoted at 4* tothe front edge of the apertured frame andadapted to close the aperture 1 in the roof, said valve having its exterior uppersurface cambered with a greater convexity of its forward orhinged end. By shaping the valve in this manner the flow ofair over it set up by the forward motion of the vehicle in the direction shown by the arrow creates a negative pressure at its rear which causes the valve .to

open automatically. To increase this negative pressure a vertical or approximately vertical plate forming a screen 5 may be provided in advance of the valve 4:. At the rear of said valve another plate 6 forming a rear screen may be provided to prevent any back flow of air from the rear of the vehicle passing through the aperture 1 into the body of the vehicle, either when the vehicle is at rest or when there is a following wind of a greater velocity than the speed at which the vehicle is travelling. These two plates may conveniently be made in one piece with the frame 7. The height of the forward screen 5 is preferably less hanthatof the rear screen 6. The aper- September 11,1e2'2', s an N6. 587,486. Divided and thisapplication filed June 7,19%. Serial No. 718,675. 1 Y Y with a suitablehandlev 10*, is mounted on the apertured frame and is adapted to be operatedto engage the valve as shown in adjustable stop 11 may be mountedon the M screen I I i To prevent air from flowing over the sides of the valve or through same whenv the valve is o ae n wliich would tend to reduce or destroy the negative pressure which causes the valve to open and remain open side plates ori shields 19 may be mounted on the apertured'frame 7.

When the vehicle fitted. with this ventilator moves in a forward direction the flow of air over the valve creates, by reason of its exterior shape, such a negative pressure at the rear of the valve as will cause it to automaticaly open, remain open and automatically exhaust the air from the body; of the vehicle 7 "Nhat I claim is I I 1, A ventilator for closed or partially closed vehicles, comprising an apertured frame adapted tobe mounted on the roof of the body of the vehicle so that its aperture registers with an aperture in said roof, a flap valve mounted on said frame the exte-rior shape of said valve being such that hinged end, and a screen mounted on the apertured frame in front of said valve.

3. An automatic Ventilator for closed or Q menses partially closed bodies of vehicles, comprising an apertured frame adapted to register with an aperture in the roof of the body of the vehicle, a flap valve having its upper and exterior surface of convex form hinged to said frame at the forward edge of the aperture therein, and a screen mounted on the apertured frame in front of said valve and means for locking said valve in its closed position.

l. An automatic v ntilator for closed or partially closed bodies of vehicles, compris' ing an apertured frame mounted on the roof of the body of the vehicle so that its aperture registers with an aperture in the roof of the body of the vehicle, a convex: shaped flap valve hinged to the said frameat the forward edge of the aperture therein, and a screen mounted on the apertured frame in front of said valve for the purpose of increasing the negative pressure at the rear of said valve.

5. An automatic ventilator for the closed or partially closed bodies of vehicles comprising an apertured frame adapted to be lined to the roof of the hody of the vehicle and register with an aperture in same, a convex shaped flap valve hinged to said apertured plate and a screen mounted on the apertured frame in front of said valve and a shield mounted on said apertured plate on each side of said Va ve for the purpose of preventing the reduction or destruction of the negative pressure at the rear of said valve.

6. The combination with a closed or par tially closed body for vehicles of an apertured frame comprising two apertured plates adapted to be fixed to the exterior and interior of the roof of the vehicle so that theapertures in same register with an aperture in said roof, and a curved flap valve hinged to the exterior plate of said frame at the forward edge of the aperture therein and a screen mounted on the apertured frame in front of said valve.

7. The combination with a closed or partially closed body for vehicles, of an apertured frame comprising two apertured plates adapted to be fixed to the roof of the vehicle and register with an aperture in said roof, a curved flap valve hinged to the exterior plate of said frame at the forward edge of the aierture therein and a screen ni ounted on the apertured frame in front of d valve, and side shields mounted on the terior plate of said apertured frame for the purpose of preventing the reduction or destruction of the negative pressure at the rear of the valve.

8. lhe combination with a closed or partially closed boc y for vehicles, of an apertured frame comprising two apertured plates adapted to be fired to the roof of the rel .cle and register with an aperture in said roof, a cnrveu iap valve hinged to the ex- -'ior of said frame at the forward edge of ti aperture therein, and a screen mounted the apertured frame in front of said and means for locking said valve in its closed position mounted on said apertured frame.

9. The combination with a closed or partially closed body for vehicles, of an aper tured frame comprising two apert-urod plates adapted to be fixed to the roof of the vehicle and register with an aperture in said roof, a curved flap valve hinged to the exterior plate of said frame at the forward edge of the aperture therein and a screen mounted on the apertured frame in front of said valve, a device mounted on the apertured frame for locking said valve in its closed position, and side shields mounted on said apertured frame for the purpose of preventing an inflow of air at the sides of the valve.

ERNEST LEONARD FORD. 

